<template>
  <el-container class="home-container">
    <!-- 头部区域 -->
    <el-header>
      <div>
        <img src="../assets/logo.png" width="70px" height="70px" alt="" />
        <span> 王者荣耀后台管理系统</span>
      </div>
      <el-button type="info" @click="logout">退出</el-button>
    </el-header>
    <!-- 页面主题区域 -->
    <el-container>
      <!-- 侧边栏 -->
      <el-aside width=" isCollapse == true ? '64px' : '200px' ">
        <div class="toggle-button" @click= "toggleCollapse">|||</div>
        <!-- 侧边栏菜单区域 -->
        <el-menu
          background-color="#333744"
          text-color="#fff"
          active-text-color="#4099EF"
          unique-opened
          :collapse = "isCollapse"
         :collapse-transition="false"
         :router="true"
         :default-active="$route.path"
        >
          <!-- default-active="$router.path" -->
           <!-- 开启router模式 	是否使用 vue-router 的模式，启用该模式会在激活导航时以 index 作为 path 进行路由跳转-->
          <!-- 一级菜单 -->
          <!-- 动态绑定index 接收字符串 -->
          <el-submenu
            :index="item.id.toString()"
            v-for="item in menuList"
            :key="item.id"
          >
            <!-- 一级菜单模板区域 -->
            <template slot="title">
              <!-- 图标 -->
              <i :class="iconObjects[item.id]"></i>
              <!-- 文本 -->
              <span>{{ item.authName }}</span>
            </template>
            <!-- 二级菜单 -->
            <el-menu-item
              :index="'/'+subItem.path.toString()"
              v-for="subItem in item.children"
              :key="subItem.id"
              @click="saveNavState(subItem.path.toString())"
            >
              <template slot="title">
                <!-- 图标 -->
                <i class="el-icon-menu"></i>
                <!-- 文本 -->
                <span>{{subItem.authName}}</span>
              </template></el-menu-item
            >
          </el-submenu>
        </el-menu>
      </el-aside>
      <!-- 右侧内容主题区域 -->
      <el-main>
        
      <!-- 路由佔位符 -->
      <router-view></router-view>
      </el-main>
    </el-container>
  </el-container>
</template>

<script>
export default {
  data() {
    return {
      // 左侧菜单数据
      menuList: [],
       iconObjects: {
        '125': "iconfont icon-user",
        '103': "iconfont icon-tijikongjian",
        '101': "iconfont icon-shangpin",
        '102': "iconfont icon-danju",
        '145': "iconfont icon-baobiao",
      },
      // 是否折叠
      isCollapse: false,
      // 被激活的链接地址
      activePath: ''
    };
  },
  created() {
    // 获取所有菜单
    this.getMenuList();
    // 赋值导航地址链接
    this.activePath = window.sessionStorage.getItem('activePath')
  },
  methods: {
    logout() {
      //  清空token 重定向到登录页面
      window.sessionStorage.clear();
      this.$router.push("/login");
    },
    // 获取所有的菜单
    async getMenuList() {
      // 发送get请求路径获取
      //解构赋值 get 返回promise ，async await简化promise操作
      const { data: res } = await this.$http.get("menus");
      // 判断是否获取成功
      if (res.meta.status !== 200) {
        return this.$message.error(res.meta.msg);
      }
      this.menuList = res.data;
    },
    // 点击按钮 切换菜单的折叠与展开
    toggleCollapse(){
        this.isCollapse = !this.isCollapse
    },
    // 保存导航链接的激活状态
    saveNavState(activePath){
      window.sessionStorage.setItem('activePath',activePath)
      // 选择不同导航时重新赋值
      this.activePath = activePath
    }
  },
};
</script>

<style lang="less" scoped>
.el-header {
  background-color: #373d41;
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: #32cd32;
  font-size: 20px;
  > div {
    display: flex;
    align-items: center;
    span {
      margin-left: 15px;
    }
  }
}
.el-aside {
  background-color: #333744;
  .el-menu {
    border-right: none;
  }
}
.el-main {
  background-color: #eaedf1;
}
.home-container {
  height: 100%;
}
.iconfont {
  margin-right: 10px;
}
.toggle-button {
  background-color: #4a5064;
  font-size: 10px;
  line-height: 24px;
  color: #fff;
  text-align: center;
  letter-spacing: 0.2em;
  cursor: pointer;
}
</style>